11212103121 has 16 divisors (see below), whose sum is σ = 15023121600. Its totient is φ = 7437947328.

The previous prime is 11212103117. The next prime is 11212103183. The reversal of 11212103121 is 12130121211.

11212103121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11212103121 - 2² = 11212103117 is a prime.

It is a super-2 number, since 2×11212103121² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11212103121.

It is not an unprimeable number, because it can be changed into a prime (11212103191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686015 + ... + 1692651.

It is an arithmetic number, because the mean of its divisors is an integer number (938945100).

Almost surely, 2^11212103121 is an apocalyptic number.

It is an amenable number.

11212103121 is a deficient number, since it is larger than the sum of its proper divisors (3811018479).

11212103121 is a wasteful number, since it uses less digits than its factorization.

11212103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9328.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11212103121 its reverse (12130121211), we get a palindrome (23342224332).

The spelling of 11212103121 in words is "eleven billion, two hundred twelve million, one hundred three thousand, one hundred twenty-one".